I've gotten a lot of value out of my fold 4, especially in spontaneous situations where I don't have a tablet or my notebook at hand. Pull out my phone, snap a picture, then annotate. Or just pull it out and draw to try and get a concept across. Reading or watching videos, sharing an image, or whatever. And I Always have it with me, because I always have my phone with me. I don't carry around my laptop everywhere, and I've never purchased a tablet.
It's just remarkably convenient